Hendricks Alison Eisel, Adlof Suzanne M
University of South Carolina, Columbia.
Lang Speech Hear Serv Sch. 2017 Jul 26;48(3):168-182. doi: 10.1044/2017_LSHSS-16-0060.
We compared outcomes from 2 measures of language ability in children who displayed a range of dialect variation: 1 using features that do not contrast between mainstream American English (MAE) and nonmainstream dialects (NMAE), and 1 using contrastive features. We investigated how modified scoring procedures affected the diagnostic accuracy of the measure with contrastive features.
Second-grade students (N = 299; 167 White, 106 African American, 26 other) completed measures of language variation and ability (the Diagnostic Evaluation of Language Variation-Screening Test and the Clinical Evaluation of Language Fundamentals-Fourth Edition [CELF-4]). The CELF-4 was scored with and without the recommended scoring modifications for children who spoke African American English.
Partial correlations controlling for socioeconomic status revealed small to moderate correlations between measures of language ability and the use of NMAE features. Modified scoring yielded higher scores for children who spoke African American English and a reduced association between the use of NMAE features and CELF-4 scores. Modified scoring also affected the diagnostic accuracy of the CELF-4, resulting in a lower positive likelihood ratio and a higher negative likelihood ratio.
The decision to apply scoring modifications affects both the false positive and false negative rates. Implications for language assessment for children who speak NMAE dialects are discussed, including the need for further investigation.
我们比较了两种语言能力测量方法在呈现一系列方言变体的儿童中的结果:一种使用在美国主流英语(MAE)和非主流方言(NMAE)之间无差异的特征,另一种使用对比性特征。我们研究了修改后的评分程序如何影响具有对比性特征的测量方法的诊断准确性。
二年级学生(N = 299;167名白人,106名非裔美国人,26名其他种族)完成了语言变体和能力的测量(语言变体诊断评估 - 筛查测试和语言基本能力临床评估 - 第四版 [CELF - 4])。CELF - 4对说非裔美国英语的儿童进行了有和没有推荐评分修改的评分。
控制社会经济地位的偏相关显示,语言能力测量与NMAE特征的使用之间存在小到中等程度的相关性。修改后的评分使说非裔美国英语的儿童得分更高,并且NMAE特征的使用与CELF - 4得分之间的关联降低。修改后的评分还影响了CELF - 4的诊断准确性,导致阳性似然比降低,阴性似然比升高。
应用评分修改的决定会影响假阳性率和假阴性率。讨论了对说NMAE方言的儿童进行语言评估的意义,包括进一步调查的必要性。